Reaming mechanism



May 24.1927. 1,630,083

B. C. HINCKLEY ET AL REAM-ING MECHANISM Filed Feb.2, 1925 A TT ORNE Y.

p Patented May 24, 1927.

` UNITED STATES 1,630,083 PATENT OFFICE.

BURTON C. HINCKIEY,.GHARLES J'. THOMAN, AND GEORGE E. HOLTON, 0F JACKSON, MICHIGAN, ASSIGNORS T0 THE HINCKLEY-MYERS COMPANY, OF JACKSON, MICHI- GAN, A CORPORATION OF MICHIGAN.

REAMING MECHANISM.

Application filed February Our invention relates to an improved reaming device and is adapted to releasably hold a cylindrical object and accurately ream the same.

An object is to provide such a device adapted to support apiece or' work to be reamed in such a manner that the reamer is disposed at all times co-axia'lly the supported work and is particularly adapted for the reaming Aof Ford transmission drumV bushings.

An object of importance is the provision in a device ,of the` character described of a work holder having a reamer arranged coaXially thereto to be advanced therethrough and ream the work held thereby. A meritorious feature is the employment in such machine of a Work holder having a head adapted to receive and releasably support the work and a. reamer mounted concentrically thereto adapted to be advanced therethrough to ream the work, the head being contractible to grip the work to support the same at all times co-axially of the reamer.

`Our Work holder is adapted toreceive and support gears or other circular parts of dilerent diameters, centering the same relative to the reamer and the reamer is so mounted with respect to the work holder as to be substantially incapable of relative dis-y placement, whereby the reamer is maintained inaccurate alinement with the work holder at allv times.

In reaming the bushings employed in Ford transmission drulns and other similar articles, the gear which carries the bushing to be reamed is frequently located eccentrically to the outside diameter of the drum in which case it is not possible to accurately ream the bushing if the worl; is supported from ysuch outside diameter of the drum. lVe therefore provide means ttor engaging the gear for support which centers the gear relative to the reamer, the reamer having,

2, 1925. Serial No.16,234.

drawing and defined `in the appended claims.

ln the drawings:

AFig. l is a vertical sectional view through our improved reamor.

Fig. 2 is a sectional view tallzenon line 2-2 of Fig. l.

` Fig. 3 is a perspective of our improved reamer.

Fig. /l is an elevation oil? an adapter caH pable ot' use in connectionwith our reamer. lVe provide a franie or body portion for the reamer indicated as 10, whichis adapted to be secured and fastened to a work bench by means of screws or bolts extending through the openings l2 in thebase of the rrame. vided with atapered opening lli, tapered to serve as a bearing lor the tapered head lG of a collet lli. The collet 1S ,is provided with a hoiloi'v'shank 2O which has a bearing as shown in liig. 2 in the lramehol 'the reamer. rlfheouter surface of the collet shanlris threaded in proximity to the reame'r iframe and carries an adjusting nut 21 provided with suitable handles 22 whereby the collet may be withdrawn relative `to the trame to bring the tapered head into close engagement with the tapered bea-ring opening in the trame within which the head is This trame is hollow and is pron nor` plurality o'fpoints 23 so as to permit the head to be contracted to grip a cylindrical piece of work such as a gear 26, which may be disposed within the mouth oli the head.

Mounted within the l'iollow shank 2O ot the collet, is a reamer pilot 28. This pilot is provided at one end with theconventional tapered recess to removably receive the shank 29 of a reamer 30.v The reamer BO is held to rotate withthe pilot by "means of a tang 32 which entends into a` seat 34 in the bottom ol the recess ot' the pilot.` The opposite end ot the pilot carries awrench 36 whereby the pilot may be rotated to ad-` vance the reamer through the work supported by the head oi the collet. The pilot and reamer as a unit is mounted co-axially of the work supporting head of the collet, and is maintained at all times concentric thereto. f

In operation, a gear 2G carrying a bushing 27 is inserted in the advanced head of the im f lll() collet and by means ot thenut Q1 the collet :20 is withdrawn so that the taper of the head engages the tapered bearing within which the head is'mounted and the head is contracted to grip the gear to hold it firmly in place, and the reamer is advanced through rotation ot' the pilot member and forced through the bushing teaming the same accurately concentric the gear.

Through the use ot' the adapter 3T shown in Fig. 4f, it is possible to accommodate a different type of gear such as a. double or triple gear, as the adapter itself is receivable within .the head of the collet and is in the 'lorm ot' a divided ring contractible upon the exertion ot' pressure thereon.

Due to the reamer having a hearing support located co-axially of the work support of the collet, the reainer is at all times maintained at the proper position to accurately ream a cylindrical object carried in .the work support ot' the collet. It is not possible for the reamer to he displaced or get out ot' alinement with the axis ot the work support. n

lllhat we claim is:

l. In a reaming fixture, a frame having a pair ot spaced-apart concentric hearings, one of said hearings being tapered, a collet movably supported within said hearings, said collet having a contractihle head mounted within the tapered bearing, and a hollow shank arranged axially of the head nounted within the other bearing of the trame, a reaining tool having a cutter head disposed within the head ol the collet between said bearings, and a shank extending through the hollow shank of the collet and having a bearing therein to support the cutter head coaxially within the head of the collet, means engaging theshank ot' the col let t'or withdrawal ol the same through the tapered bearing in the frame to contract `the collet head, and means for advancing the reaming tool longitudinally through the collet.

2. In a reaming device, a frame having a base provided with a pair ol" upright standards and a hollow casing supported thereby, a collet mounted within said casing having a tapered split head mounted within a tapered hearing in one wall oi' the casing and a shank linounted-in a concentric bearing in the opposite wall oiE the casing, a reaming tool having a cutting head mounted within the work holding head of the collet and a shank extending through and having a hearing in the collet shank, a handle rotatably threaded on the collet shank to move the saine longitudinally relative to the casing, and means engaging the shank ol the reaniing tool to advance the same through the work holding head ot the collet and the work carried thereby.

3. In a reaming fixture, a Ylralne having a hase, a housing upon the base, said housing provided with spaced-apart concentric hearings, one ot' said bearings heilig tapered, a collet niovahly supported within said hearings, said collet having a hollow longitudiA nally split work sul'iportinghead mounted within the tapered hearing ot the housing and a hollow shank arranged coaxially to the said head mounted within the other hlaring ot the housing, an adjusting nut threaded on the shank ot' the collet to withdraw the collet relative to the housing to contract the head ot' the collet within the tapered hearing ot the housing, a reaniing tool having a shank mounted within the hollow shank ot' the collet, and a cutter head disposed wholly within the hollow head ole the collet` and means tor advancing the reaniing tool longitudinally through said collet to advance the cutter head outwardly beyond the head ol the collet.

-l-. In a reaniing fixture, a hase, a housing on the hase, said housing having a pair o'l opposite side walls provided with a pair ot concentric hearings, one in each side wall, one ol said hearings being tapered, a collet mounted within said hearings tor endwise movement, said collet having a hollow contiactihle work supporting head mounted within the-tapered hearing ol the housing and adapted to he contracted thereby upon withdrawal ot'thehead through said hearing and a hollow shank mounted in the other hearing olZ the housing, a realning tool supported within the hollow shank ol. the colletlor endwise movementv therethrough provided lwith a cutter head disposed cioaxially within the hollow head ol the collet and within said housing and means lor advancing ,said cutter head outwardly bevond the head ol the collet and through the tapered bearing in the housing. A

In witness whereof we sign this specification.

BURTON C. HINCKL'EY. CHARLES J. THOMAN. GEORGE E. HOLTON. 

